<template>
    <div class="login_container">
       <div class="login_box">
        <!--头像区域-->
         <div class="avatar_box">
           <img src="../assets/logo.png">
         </div>
         <!--登录表单区域-->
         <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
           <!--用户名-->
           <el-form-item prop="username">
             <el-input  v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
           </el-form-item>
           <!--密码-->
           <el-form-item prop="password">
             <el-input  v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
           </el-form-item>
           <!--按钮-->
           <el-form-item class="btns">
               <el-button type="primary" @click="login">登录</el-button>
               <el-button type="info" @click="resetLoginForm">重置</el-button>
           </el-form-item>
         </el-form>
       </div>
    </div>
</template>

<script>
  export default {
    data(){
      return{
        //这是登录表单的数据绑定对象
        loginForm:{
          username:'admin',
          password:'123456'
        },
        loginFormRules:{
          //验证用户名
          username:[
            { required: true, message: '请输入登录名称', trigger: 'blur' },
            { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
          ],
          //验证密码
          password:[
            { required: true, message: '请输入登录密码', trigger: 'blur' },
            { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
          ]
        }
      }
    },
    methods:{
      //重置
      resetLoginForm(){
        //this 访问到$refs里面的loginFormRef，重置它
        console.log(this);
        this.$refs.loginFormRef.resetFields();
      },
      login(){
        this.$refs.loginFormRef.validate(async valid=>{
          console.log(valid);
          if(!valid) return;
          const {data:res} = await this.$http.post('login',this.loginForm)
          console.log(res)
          if(res.meta.status !== 200) return this.$message.error('登录失败');
          this.$message.success('登录成功');
          //1.将登录成功之后的token，保存到客户端的sessionStorage中(localstorage是持久化存储机制，sessionStorage会话存储机制)
          //1.1项目中除了登录之外的其他api接口，必须在登录之后才能访问
          //1.2 token只应在当前网站打开期间生效，所以将token保存在sessionstorage
          console.log(res)
          window.sessionStorage.setItem('token',res.data.token)
          //2.通过编程式导航跳转到后台主页，路由地址是/home
          this.$router.push('/home')
        })
      }
    }
  }
</script>

<style lang="less" scoped>
.login_container{
  height: 100%;
  background-color: #2b4b6b;
}
.login_box{
  width: 450px;
  height: 390px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%,-50%);
}
.avatar_box{
  height: 130px;
  width: 130px;
  border: 1px solid #eee;
  border-radius: 50%;
  padding: 10px;
  box-shadow: 0 0 10px #ddd;
  position: absolute;
  left: 50%;
  transform: translate(-50%,-50%);
  background-color: #fff;
  img{
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #eee;
  }
}
.login_form{
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
.btns{
  display: flex;
  justify-content: flex-end;
}
</style>
